MIL-PRF-49175C(CR)
3.5.7 Restart. The cooler shall restart after having cooled to the
operating temperature of at least 80°K at any ambient from -54°C to +71°C.
3.6
Environmental conditions.
3.6.1 Temperature shock. The cooler shall not be damaged (see 6.3.1) by
sudden changes in temperature between -62°C and +95°C.
3.6.2 High temperature. The cooler shall not be damaged by storage to
+95°C or operation up to +71°C.
3.6.3 Low temperature.
The cooler shall not be damaged by operation to
-54°C or storage to -62°C.
3.6.4 Shock. The cooler shall not be damaged by high intensity shocks of
100 g's peak amplitude with 11 milliseconds duration and by bench handling
tests.
3.6.5 Vibration. The cooler shall not be damaged by vibration over a
frequency spectrum at the specified g levels and amplitudes shown in Figure 4.
3.7 Burn-in. Each cooler delivered shall have accumulated a minimum of
12 hours burn-in over the temperature profile in accordance with figure 5.
3.8 Reliability. The cooler shall have a lower mean-time-to failure
(MTTF) of at least 1,000 hours.
3.9 Nameplates and product marking. The cooler shall have a nameplate
marked with the National Stock Number and the manufacturer's part number.
3.10 Workmanship. Coolers shall be processed in such a manner as to be
uniform in quality and shall be free from defects that will affect their life,
serviceability, interchangeability, or appearance.
3.11 Labeling and marking. All labeling and marking shall be clear and
legible throughout all the tests specified herein. Labeling and marking shall
be black. Jackets may have the labeling and marking engraved, or die stamped,
in which case it may be the same color as background. The top surface of the
cooler shall be marked with the following in 0.12 inch Gothic characters:
80063 Assy-
HD-1033C/UA or HD-1033B/UA (as appropriate)
4.
VERIFICATION
4.1
Classification of inspections.
Inspections shall be classified as
follows:
a.
First article inspection (see 4.2.1)
b.
Conformance inspection (see 4.3).
4
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